US3250825A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blends of crystalline polyethylene or ethylene-butene copolymer with amorphous ethylene-higher alpha-olefin copolymers
Assignee: Phillips Petroleum Co
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Filing: 1962-11-09
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Granted: 1966-05-10
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Expires: 1982-11-09
Abstract
No abstract record available.
Inventors
- 👤 Robert J Martinovich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:08
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L23/08; C08L23/0807; C08L23/0815; C08L23/10; C08L23/12; C08L23/14; C08L23/16; C08L2314/00; C08L2314/02; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/1345
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
65 words
AS A NEW COMPOSITION OF MATTER A BLEND OF NORMALLY SOLID POLYETHYLENE HAVING A DENSITY IN THE RANGE 0.94 TO 0.962 AT 20*C. AND A CRYSTALLINITY OF AT LEAST 70 PERCENT AT NORMAL ROOM TEMPERATURES AND ETHYLENE-PROPYLENE COPOLYMER, SAID COPOLYMER CONTAINING ABOUT 60 PERCENT BY WEIGHT, OF ETHYLENE, AND BETWEEN ABOUT 10 AND ABOUT 25 PERCENT BY WEIGHT OF THE TOTAL BLEND BEING SAID COPOLYMER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |